Question #fe40a

1 Answer
Jul 2, 2016

I found that the water released 31,350J of energy

Explanation:

We could use the fact that a mass m of water to change from temperature T_i=25°C to T_f=10°C will release energy Q given as:
Q=mcDeltaT

Where:

c=4.18J/(g°C) specific heat of water (i.e. the energy in Joules to change of 1°C the mass of 1g of water);

DeltaT=T_f-T_i

You get:

Q=500*4.18(10-25)=-31,350J

The minus sign indicates the loss of energy sustained by the water.

Hope it helps!